The following counties satisfy your query:
| County | Population | County Seat | State | Links |
| Clark County, AR | 23546 | Arkadelphia | Arkansas | View Public Records for Clark County, AR |
| Clark County, ID | 1022 | Dubois | Idaho | View Public Records for Clark County, ID |
| Clark County, IL | 17008 | Marshall | Illinois | View Public Records for Clark County, IL |
| Clark County, IN | 96472 | Jeffersonville | Indiana | View Public Records for Clark County, IN |
| Clark County, KS | 2390 | Ashland | Kansas | View Public Records for Clark County, KS |
| Clark County, KY | 33144 | Winchester | Kentucky | View Public Records for Clark County, KY |
| Clark County, MO | 7416 | Kahoka | Missouri | View Public Records for Clark County, MO |
| Clark County, NV | 1375765 | Las Vegas | Nevada | View Public Records for Clark County, NV |
| Clark County, OH | 144742 | Springfield | Ohio | View Public Records for Clark County, OH |
| Clark County, SD | 4143 | Clark | South Dakota | View Public Records for Clark County, SD |
| Clark County, WA | 345238 | Vancouver | Washington | View Public Records for Clark County, WA |
| Clark County, WI | 33557 | Neillsville | Wisconsin | View Public Records for Clark County, WI |